基于频率正交时间反演的空间聚焦虚拟覆盖方法研究

聂益芳; 李方伟

doi:10.11959/j.issn.1000-436x.2019211

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基于频率正交时间反演的空间聚焦虚拟覆盖方法研究

学术论文 | 更新时间：2024-06-05

- 基于频率正交时间反演的空间聚焦虚拟覆盖方法研究
- Research on space focusing virtual coverage based on orthogonal frequency time reversal method
- 通信学报 2019年40卷第10期页码：30-41
- 作者机构：
  
  1. 重庆邮电大学通信与信息工程学院，重庆 400065
  2. 重庆邮电大学移动通信关键技术重庆市重点实验室，重庆 400065
  3. 重庆工商大学环境与资源学院，重庆 400067
- 作者简介：
  
  [ "聂益芳（1990- ），女，重庆人，重庆邮电大学博士生，主要研究方向为无线网络安全、网络态势感知、无线传输理论与技术。" ]
  [ "李方伟（1960- ），男，重庆人，博士，重庆邮电大学教授、博士生导师，主要研究方向为电磁场与电磁波、无线网络安全、无线传输理论与技术。" ]
- 基金信息：
  
  国家自然科学基金资助项目(61771084);国家自然科学基金资助项目(61102062);国家自然科学基金资助项目(61271260);重庆市教委科学技术基金资助项目(KJQN201800834)
- DOI：10.11959/j.issn.1000-436x.2019211
  中图分类号： TN918.9
- 网络出版日期：2019-10，
  
  纸质出版日期：2019-10-25
- 稿件说明：
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聂益芳, 李方伟. 基于频率正交时间反演的空间聚焦虚拟覆盖方法研究[J]. 通信学报, 2019,40(10):30-41.

Yifang NIE, Fangwei LI. Research on space focusing virtual coverage based on orthogonal frequency time reversal method[J]. Journal on communications, 2019, 40(10): 30-41.
聂益芳, 李方伟. 基于频率正交时间反演的空间聚焦虚拟覆盖方法研究[J]. 通信学报, 2019,40(10):30-41. DOI： 10.11959/j.issn.1000-436x.2019211.

Yifang NIE, Fangwei LI. Research on space focusing virtual coverage based on orthogonal frequency time reversal method[J]. Journal on communications, 2019, 40(10): 30-41. DOI： 10.11959/j.issn.1000-436x.2019211.

摘要

针对超密集无线网中的信息泄露和传输覆盖效率问题，提出了基于频率正交时间反演的虚拟覆盖方法。首先，以正交子载波区分各信道，降低相关度；其次，进行时间反演，让各目标信号在目的用户附近空间聚焦；然后，研究推导出覆盖范围与信号干扰噪声比理论表达式并进行论证；最后，在确保用户覆盖需求的基础上，无关用户的覆盖范围缩小，形成了虚拟覆盖。仿真表明，在不增加功率和天线情况下，虚拟覆盖增加了接收信号难度，提升了可靠传输的安全速率和系统容量。

Abstract

To solve the problem of information leakage and coverage efficiency in ultra-dense wireless network

the orthogonal frequency-time reversal virtual coverage scheme was proposed.At first

different wireless reversal channels with lower correlation were distinguished by orthogonal carries.Next

after time reversal

the space focusing of each target signal was realized around the terminal.Then

theoretical expressions of the signal coverage and the signal-interference-to-noise ratio were derived and proved.Ultimately

the virtual coverage was shaped

meeting the requirements of users.The coverage of unrelated user not belonging to system was reduced.The results show that those unrelated users are difficult to receive the target signal because of virtual coverage.In addition

the system has higher capacity and security rate of reliable transmission without any more power or antennas.

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references

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